Inspiratory events occur because
A) The air pressure in the alveoli is greater than that of the atmosphere.
B) The air pressure in the alveoli is less than that of the atmosphere.
C) The volume of the thoracic cavity increases.
D) The air pressure in the alveoli is greater than that of the atmosphere, and the volume of the thoracic cavity increases.
E) The air pressure in the alveoli is less than that of the atmosphere, and the volume of the thoracic cavity increases.
Correct Answer:
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Q1: A transmural pressure gradient exists across the
Q2: The lungs are held against the thoracic
Q5: In addition to gas exchange, the respiratory
Q6: During inspiration
A) Intra-alveolar pressure falls below atmospheric
Q8: Which of the following is not a
Q9: When intra-alveolar pressure becomes greater than atmospheric
Q10: Which of the following is the last
Q10: Airway resistance
A) is normally the primary factor
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